ByteBuffer和String互转

        Charset charset = StandardCharsets.UTF_8;
        String str = "kj你好呀----------------kjlkjlkjlk";
        ByteBuffer buffer = ByteBuffer.allocate(1024);
        //将字符串转成ByteBuffer
        buffer.put(str.getBytes(charset));
        //切换读取数据的模式
        buffer.flip();
        //----将ByteBuffer转成字符串1------------------------------------------------------------------------------
        String string1 = charset.decode(buffer).toString();
        System.out.println(string1);
        //----将ByteBuffer转成字符串2------------------------------------------------------------------------------
        buffer.flip();
        String string2 = new String(buffer.array(), 0, buffer.limit());
        System.out.println(string2);